diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/DocBook/usb.tmpl | 1 | ||||
| -rw-r--r-- | Documentation/cpu-freq/governors.txt | 62 | ||||
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 23 | ||||
| -rw-r--r-- | Documentation/scsi/ChangeLog.megaraid | 35 | ||||
| -rw-r--r-- | Documentation/scsi/scsi_mid_low_api.txt | 37 |
5 files changed, 146 insertions, 12 deletions
diff --git a/Documentation/DocBook/usb.tmpl b/Documentation/DocBook/usb.tmpl index 15ce0f21e5e0..320af25de3a2 100644 --- a/Documentation/DocBook/usb.tmpl +++ b/Documentation/DocBook/usb.tmpl @@ -253,6 +253,7 @@ !Edrivers/usb/core/urb.c !Edrivers/usb/core/message.c !Edrivers/usb/core/file.c +!Edrivers/usb/core/driver.c !Edrivers/usb/core/usb.c !Edrivers/usb/core/hub.c </chapter> diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt index 933fae74c337..f4b8dc4237e6 100644 --- a/Documentation/cpu-freq/governors.txt +++ b/Documentation/cpu-freq/governors.txt @@ -27,6 +27,7 @@ Contents: 2.2 Powersave 2.3 Userspace 2.4 Ondemand +2.5 Conservative 3. The Governor Interface in the CPUfreq Core @@ -110,9 +111,64 @@ directory. The CPUfreq govenor "ondemand" sets the CPU depending on the current usage. To do this the CPU must have the capability to -switch the frequency very fast. - - +switch the frequency very quickly. There are a number of sysfs file +accessible parameters: + +sampling_rate: measured in uS (10^-6 seconds), this is how often you +want the kernel to look at the CPU usage and to make decisions on +what to do about the frequency. Typically this is set to values of +around '10000' or more. + +show_sampling_rate_(min|max): the minimum and maximum sampling rates +available that you may set 'sampling_rate' to. + +up_threshold: defines what the average CPU usaged between the samplings +of 'sampling_rate' needs to be for the kernel to make a decision on +whether it should increase the frequency. For example when it is set +to its default value of '80' it means that between the checking +intervals the CPU needs to be on average more than 80% in use to then +decide that the CPU frequency needs to be increased. + +sampling_down_factor: this parameter controls the rate that the CPU +makes a decision on when to decrease the frequency. When set to its +default value of '5' it means that at 1/5 the sampling_rate the kernel +makes a decision to lower the frequency. Five "lower rate" decisions +have to be made in a row before the CPU frequency is actually lower. +If set to '1' then the frequency decreases as quickly as it increases, +if set to '2' it decreases at half the rate of the increase. + +ignore_nice_load: this parameter takes a value of '0' or '1', when set +to '0' (its default) then all processes are counted towards towards the +'cpu utilisation' value. When set to '1' then processes that are +run with a 'nice' value will not count (and thus be ignored) in the +overal usage calculation. This is useful if you are running a CPU +intensive calculation on your laptop that you do not care how long it +takes to complete as you can 'nice' it and prevent it from taking part +in the deciding process of whether to increase your CPU frequency. + + +2.5 Conservative +---------------- + +The CPUfreq governor "conservative", much like the "ondemand" +governor, sets the CPU depending on the current usage. It differs in +behaviour in that it gracefully increases and decreases the CPU speed +rather than jumping to max speed the moment there is any load on the +CPU. This behaviour more suitable in a battery powered environment. +The governor is tweaked in the same manner as the "ondemand" governor +through sysfs with the addition of: + +freq_step: this describes what percentage steps the cpu freq should be +increased and decreased smoothly by. By default the cpu frequency will +increase in 5% chunks of your maximum cpu frequency. You can change this +value to anywhere between 0 and 100 where '0' will effectively lock your +CPU at a speed regardless of its load whilst '100' will, in theory, make +it behave identically to the "ondemand" governor. + +down_threshold: same as the 'up_threshold' found for the "ondemand" +governor but for the opposite direction. For example when set to its +default value of '20' it means that if the CPU usage needs to be below +20% between samples to have the frequency decreased. 3. The Governor Interface in the CPUfreq Core ============================================= diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index ebc09a159f62..2b7cf19a06ad 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -46,6 +46,29 @@ ipfrag_secret_interval - INTEGER for the hash secret) for IP fragments. Default: 600 +ipfrag_max_dist - INTEGER + ipfrag_max_dist is a non-negative integer value which defines the + maximum "disorder" which is allowed among fragments which share a + common IP source address. Note that reordering of packets is + not unusual, but if a large number of fragments arrive from a source + IP address while a particular fragment queue remains incomplete, it + probably indicates that one or more fragments belonging to that queue + have been lost. When ipfrag_max_dist is positive, an additional check + is done on fragments before they are added to a reassembly queue - if + ipfrag_max_dist (or more) fragments have arrived from a particular IP + address between additions to any IP fragment queue using that source + address, it's presumed that one or more fragments in the queue are + lost. The existing fragment queue will be dropped, and a new one + started. An ipfrag_max_dist value of zero disables this check. + + Using a very small value, e.g. 1 or 2, for ipfrag_max_dist can + result in unnecessarily dropping fragment queues when normal + reordering of packets occurs, which could lead to poor application + performance. Using a very large value, e.g. 50000, increases the + likelihood of incorrectly reassembling IP fragments that originate + from different IP datagrams, which could result in data corruption. + Default: 64 + INET peer storage: inet_peer_threshold - INTEGER diff --git a/Documentation/scsi/ChangeLog.megaraid b/Documentation/scsi/ChangeLog.megaraid index 5331d91432c7..09f6300eda4b 100644 --- a/Documentation/scsi/ChangeLog.megaraid +++ b/Documentation/scsi/ChangeLog.megaraid @@ -1,3 +1,38 @@ +Release Date : Fri Nov 11 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com> +Current Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module) +Older Version : 2.20.4.6 (scsi module), 2.20.2.6 (cmm module) + +1. Sorted out PCI IDs to remove megaraid support overlaps. + Based on the patch from Daniel, sorted out PCI IDs along with + charactor node name change from 'megadev' to 'megadev_legacy' to avoid + conflict. + --- + Hopefully we'll be getting the build restriction zapped much sooner, + but we should also be thinking about totally removing the hardware + support overlap in the megaraid drivers. + + This patch pencils in a date of Feb 06 for this, and performs some + printk abuse in hope that existing legacy users might pick up on what's + going on. + + Signed-off-by: Daniel Drake <dsd@gentoo.org> + --- + +2. Fixed a issue: megaraid always fails to reset handler. + --- + I found that the megaraid driver always fails to reset the + adapter with the following message: + megaraid: resetting the host... + megaraid mbox: reset sequence completed successfully + megaraid: fast sync command timed out + megaraid: reservation reset failed + when the "Cluster mode" of the adapter BIOS is enabled. + So, whenever the reset occurs, the adapter goes to + offline and just become unavailable. + + Jun'ichi Nomura [mailto:jnomura@mtc.biglobe.ne.jp] + --- + Release Date : Mon Mar 07 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com> Current Version : 2.20.4.6 (scsi module), 2.20.2.6 (cmm module) Older Version : 2.20.4.5 (scsi module), 2.20.2.5 (cmm module) diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt index 66565d42288f..c4af92bc705d 100644 --- a/Documentation/scsi/scsi_mid_low_api.txt +++ b/Documentation/scsi/scsi_mid_low_api.txt @@ -150,7 +150,8 @@ scsi devices of which only the first 2 respond: LLD mid level LLD ===-------------------=========--------------------===------ scsi_host_alloc() --> -scsi_add_host() --------+ +scsi_add_host() ----> +scsi_scan_host() -------+ | slave_alloc() slave_configure() --> scsi_adjust_queue_depth() @@ -196,7 +197,7 @@ of the issues involved. See the section on reference counting below. The hotplug concept may be extended to SCSI devices. Currently, when an -HBA is added, the scsi_add_host() function causes a scan for SCSI devices +HBA is added, the scsi_scan_host() function causes a scan for SCSI devices attached to the HBA's SCSI transport. On newer SCSI transports the HBA may become aware of a new SCSI device _after_ the scan has completed. An LLD can use this sequence to make the mid level aware of a SCSI device: @@ -372,7 +373,7 @@ names all start with "scsi_". Summary: scsi_activate_tcq - turn on tag command queueing scsi_add_device - creates new scsi device (lu) instance - scsi_add_host - perform sysfs registration and SCSI bus scan. + scsi_add_host - perform sysfs registration and set up transport class scsi_adjust_queue_depth - change the queue depth on a SCSI device scsi_assign_lock - replace default host_lock with given lock scsi_bios_ptable - return copy of block device's partition table @@ -386,6 +387,7 @@ Summary: scsi_remove_device - detach and remove a SCSI device scsi_remove_host - detach and remove all SCSI devices owned by host scsi_report_bus_reset - report scsi _bus_ reset observed + scsi_scan_host - scan SCSI bus scsi_track_queue_full - track successive QUEUE_FULL events scsi_unblock_requests - allow further commands to be queued to given host scsi_unregister - [calls scsi_host_put()] @@ -425,10 +427,10 @@ void scsi_activate_tcq(struct scsi_device *sdev, int depth) * Might block: yes * * Notes: This call is usually performed internally during a scsi - * bus scan when an HBA is added (i.e. scsi_add_host()). So it + * bus scan when an HBA is added (i.e. scsi_scan_host()). So it * should only be called if the HBA becomes aware of a new scsi - * device (lu) after scsi_add_host() has completed. If successful - * this call we lead to slave_alloc() and slave_configure() callbacks + * device (lu) after scsi_scan_host() has completed. If successful + * this call can lead to slave_alloc() and slave_configure() callbacks * into the LLD. * * Defined in: drivers/scsi/scsi_scan.c @@ -439,7 +441,7 @@ struct scsi_device * scsi_add_device(struct Scsi_Host *shost, /** - * scsi_add_host - perform sysfs registration and SCSI bus scan. + * scsi_add_host - perform sysfs registration and set up transport class * @shost: pointer to scsi host instance * @dev: pointer to struct device of type scsi class * @@ -448,7 +450,11 @@ struct scsi_device * scsi_add_device(struct Scsi_Host *shost, * Might block: no * * Notes: Only required in "hotplug initialization model" after a - * successful call to scsi_host_alloc(). + * successful call to scsi_host_alloc(). This function does not + * scan the bus; this can be done by calling scsi_scan_host() or + * in some other transport-specific way. The LLD must set up + * the transport template before calling this function and may only + * access the transport class data after this function has been called. * * Defined in: drivers/scsi/hosts.c **/ @@ -559,7 +565,7 @@ void scsi_deactivate_tcq(struct scsi_device *sdev, int depth) * area for the LLD's exclusive use. * Both associated refcounting objects have their refcount set to 1. * Full registration (in sysfs) and a bus scan are performed later when - * scsi_add_host() is called. + * scsi_add_host() and scsi_scan_host() are called. * * Defined in: drivers/scsi/hosts.c . **/ @@ -699,6 +705,19 @@ void scsi_report_bus_reset(struct Scsi_Host * shost, int channel) /** + * scsi_scan_host - scan SCSI bus + * @shost: a pointer to a scsi host instance + * + * Might block: yes + * + * Notes: Should be called after scsi_add_host() + * + * Defined in: drivers/scsi/scsi_scan.c + **/ +void scsi_scan_host(struct Scsi_Host *shost) + + +/** * scsi_track_queue_full - track successive QUEUE_FULL events on given * device to determine if and when there is a need * to adjust the queue depth on the device. |